Podcast
Questions and Answers
What is the primary factor that determines the resistance to airflow in the lungs?
What is the primary factor that determines the resistance to airflow in the lungs?
- The diameter of the bronchiole (correct)
- The pressure difference between the atmosphere and intrapulmonary pressure
- The surface tension of the alveoli
- The elasticity of the lung tissue
How does the relationship between flow, pressure, and resistance in pulmonary ventilation typically occur?
How does the relationship between flow, pressure, and resistance in pulmonary ventilation typically occur?
- F = ΔP × R
- ΔP = F ÷ R
- F = ΔP ÷ R (correct)
- ΔP = F × R
What happens to the resistance in the airways when the bronchiole constricts?
What happens to the resistance in the airways when the bronchiole constricts?
- It becomes insignificant
- It increases (correct)
- It remains the same
- It decreases
In healthy lungs, what is typically true about airway resistance?
In healthy lungs, what is typically true about airway resistance?
What is the relationship between gas flow and resistance in pulmonary ventilation?
What is the relationship between gas flow and resistance in pulmonary ventilation?
Why is resistance usually insignificant in the first part of the conducting zone?
Why is resistance usually insignificant in the first part of the conducting zone?
What is the total pressure exerted by all gases in the atmosphere?
What is the total pressure exerted by all gases in the atmosphere?
According to Dalton's Law, what is the relationship between the partial pressure of a gas and its percentage in the atmosphere?
According to Dalton's Law, what is the relationship between the partial pressure of a gas and its percentage in the atmosphere?
What is the primary factor that governs the movement of gases between the alveoli and blood in the lungs?
What is the primary factor that governs the movement of gases between the alveoli and blood in the lungs?
Which gas is more soluble in water?
Which gas is more soluble in water?
What is the primary site of gas exchange?
What is the primary site of gas exchange?
What determines the rate at which a gas dissolves in a liquid?
What determines the rate at which a gas dissolves in a liquid?
What is the primary function of the negative intrapleural pressure?
What is the primary function of the negative intrapleural pressure?
What is the main factor that reduces the surface tension of alveolar fluid?
What is the main factor that reduces the surface tension of alveolar fluid?
What happens to the pleural cavity as the lung moves away from the thoracic wall?
What happens to the pleural cavity as the lung moves away from the thoracic wall?
What is the effect of the elasticity of the thoracic wall on the pleural cavity?
What is the effect of the elasticity of the thoracic wall on the pleural cavity?
What is the result of the combination of the three main factors that contribute to negative intrapleural pressure?
What is the result of the combination of the three main factors that contribute to negative intrapleural pressure?
What is the direction of the force exerted by the surface tension of alveolar fluid on the lung?
What is the direction of the force exerted by the surface tension of alveolar fluid on the lung?
What is the primary effect of restrictive disorders on total lung capacity?
What is the primary effect of restrictive disorders on total lung capacity?
What is the purpose of measuring forced vital capacity (FVC)?
What is the purpose of measuring forced vital capacity (FVC)?
In obstructive diseases, what changes occur in TLC, FRC, and RV?
In obstructive diseases, what changes occur in TLC, FRC, and RV?
What is the primary difference between alveolar ventilation rate and minute ventilation?
What is the primary difference between alveolar ventilation rate and minute ventilation?
What is the primary characteristic of non-respiratory air movements?
What is the primary characteristic of non-respiratory air movements?
What is the direction of gas diffusion during gas exchange?
What is the direction of gas diffusion during gas exchange?
What is the primary response of local arterioles to a low PO2 in the alveoli?
What is the primary response of local arterioles to a low PO2 in the alveoli?
When airflow through a bronchiole is higher than normal, what is the resulting effect on PCO2?
When airflow through a bronchiole is higher than normal, what is the resulting effect on PCO2?
What is the primary consequence of a thickened respiratory membrane on gas exchange?
What is the primary consequence of a thickened respiratory membrane on gas exchange?
What is the primary adaptation of the bronchioles to changes in airflow and blood supply?
What is the primary adaptation of the bronchioles to changes in airflow and blood supply?
What is the primary consequence of a reduction in alveolar surface area on gas exchange?
What is the primary consequence of a reduction in alveolar surface area on gas exchange?
What is the primary response of the bronchioles to an increase in PCO2 in the alveoli?
What is the primary response of the bronchioles to an increase in PCO2 in the alveoli?
